Ouch - will likely be very tough to find a hotel room at this point. Have you considered just staying overnight at the fairgrounds? If you're riding with a team, you can probably sleep in the team tent on Saturday night. In my experience, this has always been a lot easier, but I understand that not everyone enjoys camping.
In case you haven't seen it already, there is a list of hotels "in the area" on the MS150 website under the "About the Ride > Accommodation" link. Good luck!